1. I'll have tea instead of coffee.

2. I'll have tea in place of coffee.
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Are both the same in meaning? Do you have any popular phrases which can be used for 'instead of'?

Both mean the same thing, yes.

You could also use "rather than."

Yes, both sentences have the same meaning. They both indicate a substitution or replacement of one thing (coffee) with another thing (tea).

The phrases "instead of" and "in place of" are commonly used to express the idea of substitution or replacement. These phrases can be used interchangeably and convey the same meaning. Some popular alternatives to saying "instead of" are "rather than," "as a substitute for," or simply using the word "instead" by itself. For example:

1. I'll have tea rather than coffee.
2. I'll have tea as a substitute for coffee.
3. I'll have tea instead.

All these phrases convey the idea that you are choosing tea instead of coffee.